To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
Carbon dioxide equivalent
Carbon dioxide equivalent (CDE) and Equivalent carbon dioxide (or CO2e) are two related but distinct measures for describing how much global warming a given type and amount of greenhouse gas (GHG) may cause, using the functionally equivalent amount or concentration of carbon dioxide (CO2) as the reference.
Additional recommended knowledge
Equivalent CO2 (CO2e) is the concentration of CO2 that would cause the same level of radiative forcing (RF) as a given type and concentration of GHG. Examples of such GHGs are methane, perfluorocarbons and nitrous oxide.
Carbon dioxide equivalency is a quantity that describes, for a given mixture and amount of greenhouse gas, the amount of CO2 that would have the same global warming potential (GWP), when measured over a specified timescale (generally, 100 years). Carbon dioxide equivalency thus reflects the time-integrated radiative forcing, rather than the instantaneous value described by CO2e.
The carbon dioxide equivalency for a gas is obtained by multiplying the mass and the GWP of the gas. The following units are commonly used:
For example, the GWP for methane is 21 and for nitrous oxide 310. This means that emissions of 1 million metric tonnes of methane and nitrous oxide respectively is equivalent to emissions of 21 and 310 million metric tonnes of carbon dioxide.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Carbon_dioxide_equivalent". A list of authors is available in Wikipedia.|